Alert archive / Pennsylvania / Winter Storm Watches in 2018

Winter Storm Watch 2, NWS Philadelphia/Mount Holly

February 5, 2018Carbon County, Monroe County, Pennsylvania; Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this winter storm watch at Feb 5, 2018, 3:29 PM EST for Carbon County, Monroe County, Pennsylvania; Sussex County, New Jersey. It took effect at Feb 7, 2018, 6:00 AM EST. It was in force for .

The area

The counties it named.

The facts

Issued
Feb 5, 2018, 3:29 PM EST (20:29 UTC)
In effect from
Feb 7, 2018, 6:00 AM EST
Expired
Feb 6, 2018, 3:37 PM EST
In force
Issued by
NWS Philadelphia/Mount Holly

Counties Sussex County, NJ, Carbon County, PA, Monroe County, PA

The radar

The Philadelphia radar (KDIX), 140 km from the middle of the area, began a volume at 20:35 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.5 hours before the alert went out and 201 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2018-02-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2018-02-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -312 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
617 m above ground
0-6 km bulk shear
90 kt
0-1 km storm-relative helicity
-312 m²/s²
0-3 km storm-relative helicity
-202 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

977 
WWUS41 KPHI 052029
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
329 PM EST Mon Feb 5 2018

NJZ001-PAZ054-055-060830-
/O.NEW.KPHI.WS.A.0002.180207T1100Z-180208T0500Z/
Sussex-Carbon-Monroe-
Including the cities of Newton, Jim Thorpe, and Stroudsburg
329 PM EST Mon Feb 5 2018

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...

* WHAT...Heavy mixed precipitation possible. Potential for snow 
  accumulations of 4 to 7 inches and ice accumulations of around 
  one tenth.

* WHERE...In New Jersey, Sussex county. In Pennsylvania, Carbon
  and Monroe counties. The highest snowfall accumulations will
  likely occur at higher elevations in the northern portion of
  these counties.

* WHEN...Snow is expected to overspread the area from southwest to
  northeast around or just after daybreak Wednesday morning. The
  snow could be heavy at times during the morning and early
  afternoon. Snow will likely transition to sleet and then
  freezing rain from south to north sometime Wednesday afternoon.
  A brief changeover to rain is possible, especially at lower
  elevations, before precipitation tapers off Wednesday evening.
 
* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during both morning and afternoon commutes on
  Wednesday. Significant reductions in visibility are possible.
  There is still some uncertainty regarding how quickly the
  transition from snow to a wintry mix to even rain occurs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant
snow, sleet or ice accumulations that may impact travel. Continue
to monitor the latest forecasts.

$$

For more information from the National Weather Service visit
www.weather.gov/phi/winter
JRK
3 follow-up statements
095 
WWUS41 KPHI 060332
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
1032 PM EST Mon Feb 5 2018

NJZ001-PAZ054-055-061500-
/O.CON.KPHI.WS.A.0002.180207T1100Z-180208T0500Z/
Sussex-Carbon-Monroe-
Including the cities of Newton, Jim Thorpe, and Stroudsburg
1032 PM EST Mon Feb 5 2018

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING 
THROUGH WEDNESDAY EVENING...

* WHAT...Heavy mixed precipitation possible. Potential for snow 
  accumulations of 4 to 7 inches and ice accumulations of around 
  one tenth.

* WHERE...In New Jersey, Sussex county. In Pennsylvania, Carbon 
  and Monroe counties. The highest snowfall accumulations will 
  likely occur at higher elevations in the northern portion of 
  these counties.

* WHEN...Snow is expected to overspread the area from southwest 
  to northeast around or just after daybreak Wednesday morning. 
  The snow could be heavy at times during the morning and early 
  afternoon. Snow will likely transition to sleet and then 
  freezing rain from south to north sometime Wednesday afternoon. 
  A brief changeover to rain is possible, especially at lower 
  elevations, before precipitation tapers off Wednesday evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during both morning and afternoon commutes on 
  Wednesday. Significant reductions in visibility are possible. 
  There is still some uncertainty regarding how quickly the 
  transition from snow to a wintry mix to even rain occurs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant 
snow, sleet or ice accumulations that may impact travel. Continue 
to monitor the latest forecasts.

$$

For more information from the National Weather Service visit 
www.weather.gov/phi/winter
581 
WWUS41 KPHI 060834
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
334 AM EST Tue Feb 6 2018

NJZ001-PAZ054-055-062200-
/O.CON.KPHI.WS.A.0002.180207T1100Z-180208T0500Z/
Sussex-Carbon-Monroe-
Including the cities of Newton, Jim Thorpe, and Stroudsburg
334 AM EST Tue Feb 6 2018

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING 
THROUGH WEDNESDAY EVENING...

* WHAT...Heavy mixed precipitation is possible. There is the 
  potential for snow accumulations of 4 to 7 inches and ice 
  accumulations of around one tenth of an inch.

* WHERE...Sussex County in New Jersey and the Pennsylvania 
  counties of Carbon and Monroe.

* WHEN...Snow is expected to overspread the area from southwest 
  to northeast around or just after daybreak on Wednesday. The 
  snow could be heavy at times during the morning and early 
  afternoon. Snow will likely transition to sleet, then to 
  freezing rain from south to north on Wednesday afternoon. A 
  brief change to rain is possible, especially in the valleys, 
  before the precipitation comes to an end on Wednesday evening.

* ADDITIONAL DETAILS...Travel will become difficult on Wednesday.
  If you will be driving, prepare for reduced visibility. There 
  remains some uncertainty regarding the timing of the transition 
  from snow to a wintry mix. The heaviest of the snowfall is 
  expected in the elevated terrain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant 
snow, sleet or ice accumulations that may impact travel. Continue 
to monitor the latest forecasts.

$$

For more information from the National Weather Service visit
www.weather.gov/phi/winter
179 
WWUS41 KPHI 062037
WSWPHI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Mount Holly NJ
337 PM EST Tue Feb 6 2018

NJZ001-PAZ054-055-070845-
/O.UPG.KPHI.WS.A.0002.180207T1100Z-180208T0500Z/
/O.NEW.KPHI.WS.W.0003.180207T0900Z-180208T0200Z/
Sussex-Carbon-Monroe-
Including the cities of Newton, Jim Thorpe, and Stroudsburg
337 PM EST Tue Feb 6 2018

...WINTER STORM WARNING IN EFFECT FROM 4 AM TO 9 PM EST
WEDNESDAY...

* WHAT...Heavy mixed precipitation expected. Total snow 
  accumulations of 4 to 7 inches and ice accumulations of around 
  one tenth of an inch are expected.

* WHERE...In New Jersey, Sussex County. In Pennsylvania, Carbon
  and Monroe Counties.

* WHEN...Snow is expected to begin late tonight, becoming heavy at
  times Wednesday morning. Snow will mix with sleet and freezing
  rain Wednesday afternoon. The wintry mix may briefly transition
  back to snow before ending Wednesday evening.

* ADDITIONAL DETAILS...Plan on very difficult travel conditions,
  including during the morning and evening commutes on Wednesday.
  Be prepared for significant reductions in visibility at times
  during heavy snow. Snowfall rates may exceed one inch per hour
  during the morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice are expected. This will make travel very hazardous or
impossible. The latest road conditions for the state you are
calling from can be obtained by calling 5 1 1.

$$

DEZ001-MDZ008-012-NJZ013-016>019-070845-
/O.NEW.KPHI.WW.Y.0006.180207T0900Z-180207T1400Z/
New Castle-Cecil-Kent MD-Western Monmouth-Salem-Gloucester-Camden-
Northwestern Burlington-
Including the cities of Wilmington, Elkton, Chestertown, 
Freehold, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown,
and Mount Holly
337 PM EST Tue Feb 6 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 9 AM EST
WEDNESDAY...

* WHAT...Snow, sleet, and freezing rain expected. Total ice
  accumulations of a light glaze are expected. Total snow and
  sleet accumulations of up to one half of an inch of snow and 
  sleet.

* WHERE...Portions of central and southern New Jersey, northeast 
  Maryland and northern Delaware.

* WHEN...Precipitation is expected to begin briefly as snow late
  tonight before transitioning to sleet and freezing rain during
  the morning commute on Wednesday. Precipitation should change to
  rain from south to north between 7 and 9 AM.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the morning commute on Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
slippery roads and limited visibilities, and use caution while
driving. The latest road conditions for the state you are calling
from can be obtained by calling 5 1 1.

$$

NJZ012-015-PAZ070-071-102-104-106-070845-
/O.NEW.KPHI.WW.Y.0006.180207T0900Z-180207T1600Z/
Middlesex-Mercer-Delaware-Philadelphia-Eastern Chester-
Eastern Montgomery-Lower Bucks-
Including the cities of New Brunswick, Trenton, Media, 
Philadelphia, West Chester, Kennett Square, Norristown, Lansdale,
Morrisville, and Doylestown
337 PM EST Tue Feb 6 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 11 AM EST
WEDNESDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations 
  of up to one inch and ice accumulations of a light glaze are 
  expected.

* WHERE...Portions of central and northern New Jersey and
  southeast Pennsylvania, including the Philadelphia metropolitan
  area.

* WHEN...Precipitation is expected to begin as snow late tonight
  before transitioning to a wintry mix of sleet and freezing rain
  during or just after the morning commute on Wednesday.
  Precipitation should change to rain from southeast to northwest
  between 9 and 11 AM.

* ADDITIONAL DETAILS...Plan on slippery road conditions for the 
  morning commute on Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
slippery roads and limited visibilities, and use caution while
driving. The latest road conditions for the state you are calling
from can be obtained by calling 5 1 1.

$$

NJZ009-010-PAZ101-103-105-070845-
/O.NEW.KPHI.WW.Y.0006.180207T0900Z-180207T1900Z/
Hunterdon-Somerset-Western Chester-Western Montgomery-Upper Bucks-
Including the cities of Flemington, Somerville, Honey Brook, 
Oxford, Collegeville, Pottstown, Chalfont, and Perkasie
337 PM EST Tue Feb 6 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 2 PM EST
WEDNESDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  up to two inches and ice accumulations of up to one-tenth inch
  are expected.

* WHERE...Portions of northern and northwestern New Jersey and 
  southeastern Pennsylvania.

* WHEN...Precipitation is expected to begin as snow late tonight
  through the morning commute on Wednesday. The snow should change
  to sleet and freezing rain by mid morning and then to rain 
  during the early afternoon hours.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the morning commute on Wednesday. Be prepared for 
  reduced visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
slippery roads and limited visibilities, and use caution while
driving. The latest road conditions for the state you are calling
from can be obtained by calling 5 1 1.

$$

NJZ007-008-PAZ060>062-070845-
/O.NEW.KPHI.WW.Y.0006.180207T0900Z-180208T0200Z/
Warren-Morris-Berks-Lehigh-Northampton-
Including the cities of Washington, Morristown, Reading, 
Allentown, Bethlehem, and Easton
337 PM EST Tue Feb 6 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 9 PM EST
WEDNESDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations of
  2 to 4 inches and ice accumulations of up to one-tenth inch 
  are expected.

* WHERE...The Lehigh Valley in Pennsylvania, and Warren and Morris
  Counties in New Jersey.

* WHEN...Precipitation is expected to begin as snow late tonight
  and may become heavy at times during the morning commute on
  Wednesday. Snow will change to a wintry mix of sleet and
  freezing rain late in the morning and continue through the
  afternoon hours. Precipitation may transition to rain late in
  the afternoon and early evening, especially in the warmer
  valleys.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the morning and evening commutes on Wednesday. Be
  prepared for reduced visibilities at times, especially in the
  morning when snowfall rates of one inch per hour may occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
slippery roads and limited visibilities, and use caution while
driving. The latest road conditions for the state you are calling
from can be obtained by calling 5 1 1.

$$

For more information from the National Weather Service visit
www.weather.gov/phi/winter

CMS/LR/JRK

Nearby

Winter Storm Watches in Pennsylvania, 2018Winter Storm Watches in New Jersey, 2018Every winter storm watch in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.